摘要
The coupling between electric ordering and magnetic ordering in two-dimensional(2D)materials is important for both fundamental research of 2D multiferroics and future development of magnetism-based information storage and operation.Here,we introduce a scheme for realizing a magnetic phase transition through the transition of electric ordering.We take CuMoP_(2)S_(6) monolayer as an example,which is a member of the large 2D transition-metal chalcogen-phosphates family.Based on first-principles calculations,we find that it is a multiferroic with unprecedented characters,namely,it exhibits two different phases:an antiferroelectric-antiferromagnetic phase and a ferroelectric-ferromagnetic phase,in which the electric and magnetic orderings are strongly coupled.Importantly,the electric polarization is out-of-plane,so the magnetism can be readily switched by using the gate electric field.Our finding reveals a series of 2D multiferroics with special magnetoelectric coupling,which hold great promise for experimental realization and practical applications.
作者
Chenqiang Hua
Hua Bai
Yi Zheng
Zhu-An Xu
Shengyuan A.Yang
Yunhao Lu
Su-Huai Wei
华陈强;白桦;郑毅;许祝安;杨声远;陆赟豪;魏苏淮(Zhejiang Province Key Laboratory of Quantum Technology and Device,State Key Laboratory of Silicon Materials,Department of Physics,Zhejiang University,Hangzhou 310027,China;Research Laboratory for Quantum Materials,Singapore University of Technology and Design,Singapore 487372,Singapore;Beijing Computational Science Research Center,Beijing 100193,China)
基金
Supported by the National Key R&D Program of China(Grant No.2019YFE0112000)
the Zhejiang Provincial Natural Science Foundation of China(Grant No.LR21A040001)
the National Natural Science Foundation of China(Grant No.11974307,12088101,11991060,and U1930402).
